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Finding the Fourth Proportional to 155,751.09, 214,921.87 and 87,756.85

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Solution

The fourth proportional to 155,751.09, 214,921.87 and 87,756.85 is: 121,096.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,751.09 : 214,921.87 = 87,756.85 : x
  2. Step 2: Convert to fraction form
    155,751.09/214,921.87 = 87,756.85/x
  3. Step 3: Cross multiply
    155,751.09x = 214,921.87 × 87,756.85
  4. Step 4: Simplify right side
    155,751.09x = 18,860,866,307.31
  5. Step 5: Solve for x
    x = 18,860,866,307.31/155,751.09
  6. Step 6: Final answer
    x = 121,096.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.